It is necessary to simulate the high enthalpy, high pressure, Mach number and the same concentration of oxygen species as air in hypersonic flight.
地面实验设备必须要模拟高超音速飞行状态下气流的焓、压力、M数和空气中氧气的组分。
FL-7 is a continuous transonic wind tunnel, which is powered by three engines. Mach number is adjusted by the rotating speed of engines, the flexible wall nozzle and the by-pass valve.
7风洞是以三台航空发动机为动力的跨音速风洞，通过调节发动机转速、柔壁及旁路活门开度来实现对M数的控制。
With increasing convective mach number the skewness and flatness factors increase a little and the peak positions move outwards.
随着对流马赫数的增加，脉动的偏斜性和间歇性略有增加，并且其峰值对应的位置向混合层外侧移动。
Results show that under small Mach number the main source of discrete noise is the fluctuating force, which gives a guide for cutting discrete noise down.
研究表明，低马赫数情况下叶轮离散噪声主要是由脉动力造成，为降低低马赫数下的叶轮离散噪声提供了参考。
Research is carried out on the discrete noise theory and calculation method, the calculation model of discrete noise and the approximate formula under small Mach number are verified by experiments.
对低马赫数叶轮离散噪声的机理及计算方法进行了研究，并推导了离散噪声的声压计算式、低马赫数下近似计算式和轴心线上的计算式，还实验验证了计算模型。
The critical Mach number is influenced by the initial pressure and temperature, but the temperature is the main factor.
可燃气体初始温度和压力对起爆临界马赫数都有影响，但是初始温度的影响大得多。
This method is used to design a series of nozzles. Their Mach number profiles are satisfied for the users.
利用该法设计的一系列喷管，其M数分布满足用户需要。
The average effective pitch damping increases with increasing Angle of oscillation amplitude and decreases with increasing Mach number.
角振幅增大会使返回舱的平均俯仰阻尼增加，马赫数增大使俯仰阻尼降低。
As example, the operating regime, wall profile and performance parameters of supersonic combustors with entry Mach number 2.2 are computed in some detail.
并以燃烧室的进口马赫数是2.2为例，对燃烧室的工况、壁型及参数变化进行了详细的分析研究。
The model inputs include the fuel flow, the nozzle area, the altitude and Mach number, and model outputs include the rotor speed, the temperature and the air pressure.
模型的输入量包括燃油流量、喷口面积、高度及马赫数，输出量则包括高、低压转子的转速及各截面的温度和压力。
Aimed at the jet noise which is induced by the expand structure and tail tube in the resistant muffler, a finite element model at low Mach number was developed.
针对抗性消声器中扩张结构和尾管引起的射流噪声问题，建立了低马赫数射流噪声有限元分析模型。
The numerical simulation technique is used to investigating the isentropic Mach number distribution on the different swept height blade surfaces of a turbine last stage blades.
采用数值模拟技术详细地研究了不同掠高的某蒸汽轮机末级前掠叶片表面等熵马赫数的分布。
The time histories of ground responses and wave motions are presented, and it was found that significant wave propagations are generated when Mach number of moving load approaches or exceeds 1.0.
通过数值计算给出了地基表面振动的动力时程和三维波动场的分布，发现当移动荷载的马赫数接近或大于1.0时地基中产生明显的波动传播现象。
The flow field parameter distribution can be affected more in upper stream, especially near the leading edge area while the Mach number distribution of the upstream blade surface is affected little.
对上游进口段，特别是靠近叶片前缘区域流场参数分布有较大影响，但对于上游叶片表面马赫数影响不大。
The aviation bomb is flying in the high density atmosphere layer. Its fight Mach number is generally 0.9.
航弹主要是在稠密的大气层中飞行，巡航马赫数一般在0.9附近。
This paper presents the surface characteristics of the inter-action between shock wave and turbulent boundary layer induced by sharp fin with emphasis on Mach number effects.
本文介绍了尖前缘翼诱导激波和湍流边界层干扰流场壁面特性，着重强调马赫数影响。
Here the gas velocity corresponds to a Mach number of one, denoting that the flow velocity is equal to the local speed of sound of the particular gas.
在这里，气速对应到一个马赫数之一，指该流速等于当地音速的，特别是天然气。
The shock total pressure was estimated with the normal component of the Mach number using normal shock theory.
激波总压损失用正激波关系式通过马赫数法向分量估计。
Numerical results show that contribution of high order terms are very important at lower Mach number or high angles of attack.
数值结果表明高阶项的贡献在较低马赫数或大迎角情况下是很重要的。
With increasing convective Mach number the streamwise fluctuation intensity varies little but the transverse and spanwise intensity along with the thickness growth rate decrease.
随着对流马赫数的增加，流向脉动强度变化不大，横向和展向脉动强度减小，混合层的扩张率随之减小。
The initiation point is not fixed on the focusing point but varies with the incident shock Mach number.
爆轰波爆点位置在对称轴上并不是固定的点，而是随着初始激波马赫数的变化而发生移动；
It shows the indicated airspeed and the Mach number.
它显示了飞行速度和马赫数。
The hot air permitted higher speeds before the critical Mach number was exceeded.
热空气可使之在超过临界马赫数之前达到更快的速度。
A power correlation between expansion ratio and Mach number at the nozzle outlet was found.
并给出了膨胀比与喷嘴出口马赫数之间的幂指数关系。
The categorization is based on 4 parameters, namely, flight height, flight Mach number, engine rotational speed and overload on the engine center of gravity.
选取了飞行高度、飞行马赫数、发动机转速以及发动机重心法向过载等4个参数作为分类的原始依据参数。
The properties of ion-acoustic soliton such as its excitation, spatial evolution aad Mach number are studied on a stable plasma device.
本文在稳态等离子体装置中，对离子声孤立子的激发、空间传播和马赫数等进行了研究。
The properties of ion-acoustic soliton such as its excitation, spatial evolution aad Mach number are studied on a stable plasma device.
本文在稳态等离子体装置中，对离子声孤立子的激发、空间传播和马赫数等进行了研究。
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